Medium road bike chain ring



FIG. 1 is a front perspective view of the medium road bike chain ring;

FIG. 2 is a rear perspective view of the medium road bike chain ring;

FIG. 3 is a front view of the medium road bike chain ring

FIG. 4 is an edge view of the medium road bike chain ring; and,

FIG. 5 is a rear view of the medium road bike chain ring. 

The ornamental design for the medium road bike chain ring, as shown and described. 